The Secrets to How Hollywood's Royalty Stays in Shape

This 64-year-old actress is used to playing the tough, muscly heroine in her movies, so it's no wonder Sigourney Weaver keeps fit. She has said that exercise keeps her looking and feeling young (she's been a devoted Pilates practicer in the past) as well as healthy. Plus, as a spokesperson for the American Heart Association, she helped spread the word of the importance of a healthy diet and exercise routine in the organization's Go Red campaign.